Patch-type drug infusion device

ABSTRACT

A patch-type drug infusion device, includes a control structure provided with multiple first fastening portions and first electrical contacts; and an infusion structure, including a case, provided with multiple second electrical contacts and second fastening portions that cooperate with the first fastening portions, an outward extending portion provided on the case, and a block provided on the outside of the outward extending portion. The first fastening portions and the second fastening portions are fastened, making the control structure and the infusion structure assembled together, the first electrical contacts connect with the corresponding second electrical contacts. The block can prevent the control structure from detaching from the infusion structure.

TECHNICAL FIELD

The present invention mainly relates to the field of medicalinstruments, in particular to a patch-type drug infusion device.

BACKGROUND

The pancreas in a normal person can automatically monitor the amount ofglucose in the blood and automatically secrete the required dosage ofinsulin/glucagon. However, for diabetic patients, the function of thepancreas is abnormal, and the pancreas cannot normally secrete requireddosage of insulin. Therefore, diabetes is a metabolic disease caused byabnormal pancreatic function and also a lifelong disease. At present,medical technology cannot cure diabetes, but can only control the onsetand development of diabetes and its complications by stabilizing bloodglucose.

Patients with diabetes need to check their blood glucose beforeinjecting insulin into the body. At present, most of the detectionmethods can continuously detect blood glucose, and send the bloodglucose data to the remote device in real time for the user to view.This detection method is called Continuous Glucose Monitoring (CGM),which requires the detection device to be attached to the surface of thepatients' skin, and the sensor carried by the device is inserted intothe subcutaneous tissue fluid for testing. According to the bloodglucose (BG) level, the infusion device, as a closed-loop orsemi-closed-loop artificial pancreas, injects the currently requiredinsulin dose.

However, for a drug infusion device that uses electrical contacts toachieve electrical connection, the control component is easy to detachfrom the infusion component, which worsens the users experience.

Therefore, in the prior art, there is an urgent need for a drug infusiondevice that can prevent the control component from detaching from theinfusion component.

BRIEF SUMMARY OF THE INVENTION

The invention discloses a patch-type drug infusion device, in which, ablock, used for blocking the control structure, is provided on theoutside of the outward extending portion. The block can prevent thecontrol structure from detaching from the infusion structure, ensuringthe normal operation of the infusion device.

The invention discloses a patch-type drug infusion device, whichcomprises: a control structure provided with multiple first fasteningportions and first electrical contacts exposed on the surface of thecontrol structure; and an infusion structure, including a case, providedwith multiple second electrical contacts exposed on the surface of thecase and second fastening portions that cooperate with the firstfastening portions, an outward extending portion provided on the case,and a block, used for blocking the control structure, is provided on theoutside of the outward extending portion, the first fastening portionsand the second fastening portions are fastened, making the controlstructure and the infusion structure assembled together, the firstelectrical contacts connect with the corresponding second electricalcontacts.

According to one aspect of the present invention, the first fasteningportions and the second fastening portions include one or more of hooks,blocks, holes, or slots that cooperate with each other.

According to one aspect of the present invention, the outer end of theoutward extending portion is provided with a pressing portion.

According to one aspect of the present invention, the case includesupper case and lower case.

According to one aspect of the present invention, the extending portionis disposed on the lower case.

According to one aspect of the present invention, it further includes anunlocking hole disposed on the lower case and set in the inner side ofthe block.

According to one aspect of the present invention, the infusion structureis further provided with one or more crease grooves which are disposedon the side of the unlocking hole.

According to one aspect of the present invention, two crease grooves areprovided at the two ends of the block, respectively.

According to one aspect of the present invention, one of the firstelectrical contacts or the second electrical contacts is a rigid metalpin or an elastic conductive member.

According to one aspect of the present invention, the type of theelastic conductive member includes conductive spring, conductive leafspring, conductive rubber, or conductive silica gel.

According to one aspect of the present invention, one of the firstelectrical contacts is a rigid metal pin while one of the secondelectrical contacts is a conductive spring, a groove, within which asealing element is provided, is disposed around the area where multiplesecond electrical contacts are disposed.

Compared with the prior art, the technical solution of the presentinvention has the following advantages:

In the patch-type drug infusion device disclosed by the presentinvention, in the infusion structure, an outward extending portionprovided on the case, and a block, used for blocking the controlstructure, is provided on the outside of the outward extending portion,the first fastening portions and the second fastening portions arefastened, making the control structure and the infusion structureassembled together, the first electrical contacts connect with thecorresponding second electrical contacts. The block can prevent thecontrol structure from detaching from the infusion structure, ensuringthe normal operation of the infusion device. Secondly, the contact areaof the electrical contact is much smaller, which provides moreflexibility to the structure design, and can effectively reduce thevolume of the control structure.

Furthermore, the outer end of the outward extending portion is providedwith a pressing portion. While the user is replacing the infusionstructure, a finger presses the pressing portion, releasing the controlstructure from the block easily.

Furthermore, it further includes an unlocking hole disposed on the lowercase and set in the inner side of the block. While the pressing portionis being pressed, a finger can enter the unlocking hole, thereby pushingthe control structure out to separate the control structure from theinfusion structure.

Furthermore, the infusion structure is further provided with one or morecrease grooves which are disposed on the side of the unlocking hole.After the crease groove is provided, the thickness or width of the lowercase at the position of the crease groove is reduced. When the userpresses the pressing portion, the lower case is easy to be broken at theposition of the crease groove, and the blocking of the control structureby the block is more smoothly released.

Furthermore, the type of the elastic conductive member includes aconductive spring, a conductive leaf spring, a conductive rubber, or aconductive silica gel. An elastic conductive member, compared with afixed contact, can further increase the reliability of the electricalconnection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 a and FIG. 1 b are respectively schematic views of the controlstructure according to an embodiment of the present invention;

FIG. 2 a is a schematic view of the infusion structure according to anembodiment of the present invention;

FIG. 2 b is a side view of the assembly of the control structure and theinfusion structure according to an embodiment of the present invention;

FIG. 2 c is a schematic top view of the lower case of the infusionstructure according to an embodiment of the present invention;

FIG. 2 d is a schematic top view of the lower case of the infusionstructure according to another embodiment of the present invention;

FIG. 3 a and FIG. 3 b are respectively schematic views of the internalstructure of the infusion structure according to an embodiment of thepresent invention.

DETAILED DESCRIPTION

As mentioned above, in the prior art, the control component is easy todetach from the infusion component, which worsens the users experience.

Studies have found that the cause of the above-mentioned problem is thatin the existing infusion device, the control structure is fastened bythe fastening portion without a blocking member, resulting in thecontrol component easy to detach from the infusion component, whichworsens the users experience.

In order to solve this problem, the present invention provides a druginfusion device, in which a block, used for blocking the controlstructure, is provided on the outside of the outward extending portion.The block can prevent the control structure from detaching from theinfusion structure, ensuring the normal operation of the infusiondevice.

Various exemplary embodiments of the present invention will now bedescribed in detail with reference to the drawings. The relativearrangement of the components and the steps, numerical expressions andnumerical values set forth in the embodiments are not to be construed aslimiting the scope of the invention.

In addition, it should be understood that, for ease of description, thedimensions of the various components shown in the figures are notnecessarily drawn in the actual scale relationship, for example, thethickness, width, length or distance of certain units may be exaggeratedrelative to other structures.

The following description of the exemplary embodiments is merelyillustrative, and is not intended to be in any way limiting theinvention and its application or use. The techniques, methods anddevices that are known to those of ordinary skill in the art may not bediscussed in detail, but such techniques, methods and devices should beconsidered as part of the specification.

It should be noted that similar reference numerals and letters indicatesimilar items in the following figures. Therefore, once an item isdefined or illustrated in a drawing, it will not be discussed further infollowing description of the drawings.

FIG. 1 a -FIG. 1 b are schematic views of the control structure 100according to an embodiment of the present invention.

The patch-type drug infusion device of the embodiment of the presentinvention includes two main parts: a control structure 100 and aninfusion structure 110, which will be described separately in detailbelow. And in another embodiment of the present invention, thepatch-type drug infusion device can be provided with more than twoparts, which is not specifically limited herein.

The patch-type drug infusion device refers to a tubing-free infusiondevice that is entirely pasted on the user's skin surface by the onepiece of medical tape 120. And the infusion device is provided with aninfusion needle unit 121, integrated on the infusion device, instead ofa long tube, therefore, drug can be directly infused from the drugreservoir 131 to the subcutaneous tissue through the infusion needleunit 121.

The patch-type drug infusion device of the embodiment of the presentinvention includes a control structure 100 which receives signals orinformation from a remote device or a body fluid parameter detectiondevice (such as CGM), and controls the infusion device to infuse drug(s)accordingly.

Inside the housing 101 of the control structure 100 are disposed programmodules, circuit board(s) and related electronic units for receivingsignals or issuing control instructions, as well as other mechanicalunits or structures necessary for realizing the infusion function, whichis not limited herein. In another embodiment of the present invention, apower supply 133 can be also provided in the control structure.Preferably, in the embodiment of the present invention, the power supply133 is provided in the infusion structure 110, which will be describedbelow.

The control structure 100 further includes multiple first electricalcontacts 103 exposed on the surface of it. The first electrical contact103 is used as circuit connection terminal for electrically connectingthe internal circuits provided in the control structure 100 and theinfusion structure 110, respectively. The embodiment of the presentinvention does not specifically limit the positions of first electricalcontacts 103.

Compared with the plug connector used as connection terminal in theprior arts, the contact area of the electrical contact is much smaller,which provides more flexibility to the structure design, and caneffectively reduce the volume of the control structure. At the sametime, these smaller electrical contacts can be directly electricallyconnected to the internal circuit or electrical components, or can bedirectly soldered on the circuit board, which helps to optimize thedesign of the internal circuit and effectively reduce the complexity ofthe circuit, thereby, saving costs and reducing the volume of theinfusion device. Furthermore, the electrical contacts are exposed on thesurface of the control structure 100 to facilitate electrical connectionwith connection ends on other structures. The above technical advantagesof the electrical contacts are applicable to both the first electricalcontact 103 on the control structure 100 and the second electricalcontact 113 on the infusion structure 110, which will not be describedrespectively in detail below.

The type of the first electrical contact 103 includes rigid metal pinsor elastic conductive members. Preferably, in the embodiment of thepresent invention, the first electrical contact 103 is a rigid metalpin. One end of the first electrical contact 103 is electricallyconnected to the connection end provided inside the control structure100 while the other end is exposed on the surface of the housing 101.And the rest part of the first electrical contact 103 is tightlyembedded in the housing 101, thus keeping the inside of the controlstructure 100 isolated from the outside.

Here, the type of the elastic conductive member includes conductivespring, conductive silica gel, conductive rubber, or conductive leafspring. Obviously, one end of the elastic conductive member is used toelectrically connect with the internal connection end in the controlstructure 100 while the other end is used to electrically connect withother connection ends. As in an embodiment of the present invention, thefirst electrical contact 103 is a conductive spring. When the electricalcontacts are in contact with each other, the elasticity of theconductive spring can enhance the reliability of the electricalconnection. Similar to the rigid metal pin, one end of the conductivespring is exposed on the surface of the housing 101, while the rest partof the conductive spring is tightly embedded in the housing 101 andelectrically connected with internal circuits or electrical components.Obviously, the connection end disposed inside the control structure 100can be a conductive lead, a specific part of a circuit, or an electricalelement.

It should be noted that the “tightly embedded” in the embodiment of thepresent invention means that there is no gap between the electricalcontact and the housing 101, keeping the control structure 100 tightlysealed. The following “tightly embedded” has the same meaning as here.

In another embodiment of the present invention, the first electricalcontact 103 is a conductive spring, but it is not tightly embedded inthe housing 101. Instead, a sealing element is provided in a groove,both of which are disposed around the area where the first electricalcontacts 103 are located, thus, sealing the electrical contact area andthe control structure 100.

In the embodiment of the present invention, the control structure 100 isfurther provided with first fastening portions 102 which is used tofasten with the second fastening portion 112 disposed on the infusionstructure 110 to assemble the control structure 100 and the infusionstructure 110, thereby enabling the electrical connection between thefirst electrical contacts 103 and the second electrical contacts 113,which will be described in detail below.

The first fastening portion 102 and the second fastening portion 112include one or more of hooks, blocks, holes, and slots that can befastened with each other. The positions of the hooks, blocks, holes, andslots can be flexibly adjusted according to the shape and structurefeatures of the control structure 100 and the infusion structure 110,such as disposed in the interior or on the surface of the correspondingstructure, which is not specifically limited herein.

In the embodiment of the present invention, the control structure 100 isfurther provided with a concave 104 that fits the convex portion 114disposed at the bottom of the case of the infusion structure 110, whichwill be described in detail below. Preferably, the first electricalcontacts 103 are provided in the concave 104, as shown in FIG. 1B.

In the embodiment of the present invention, a buzzer (not shown) is alsoprovided in the control structure 100. When the infusion process startsor ends, the infusion device malfunctions, the drug is exhausted, thecontrol structure 100 issues an error command or receives an errormessage, etc., the buzzer is used to issue alarm signals, such as soundor vibration, notifying the user to adjust or replace the device intime.

Preferably, in the embodiment of the present invention, the housing 101of the control structure 100 is provided with a sound-permeable outlet105 to allow the sound alarm signal from the buzzer to be sent out. Inorder to achieve a good sealing effect and ensure the normal operationof the buzzer, a waterproof sound-permeable membrane (not shown) isdisposed between the sound-permeable outlet 105 and the buzzer.Therefore, the waterproof sound-permeable membrane needs to have acertain porosity to ensure the sound transmission but prevent watermolecules penetration.

Compared with the traditional technical solution in which the buzzer isentirely enclosed in the control structure 100, because of thesound-permeable outlet 105, a less loud sound signal emitted from thebuzzer would be enough to raise the user's attention, which reduces theenergy consumption of the buzzer, thereby optimizing the powerconsumption configuration of the infusion device and saving productioncosts.

FIG. 2 a is a schematic view of the infusion structure 110 according tothe embodiment of the present invention. FIG. 2 b is a side view of theassembly of the control structure 100 and the infusion structure 110according to the embodiment of the present invention. FIG. 2 c is aschematic top view of the lower case of the infusion structure accordingto an embodiment of the present invention. FIG. 2 d is a schematic topview of the lower case of the infusion structure according to anotherembodiment of the present invention.

The patch-type drug infusion device further includes an infusionstructure 110 with a case. A mechanical unit, an electric control unit,and other auxiliary units for completing drug infusion process areprovided inside the case, which will be described in detail below. Thecase of the infusion structure 110 may include multiple parts. As in theembodiment of the present invention, the case of the infusion deviceincludes an upper case 111 a and a lower case 111 b.

As mentioned above, in the embodiment of the present invention, theinfusion structure 110 is provided with the second fastening portions112 which is used to cooperate and fasten with the corresponding firstfastening portions 102. Therefore, the positions where the firstfastening portion 102 and the second fastening portion 112 are providedcorrespond to each other.

In the embodiment of the present invention, the infusion structure 110is provided with second electrical contacts 113 which are used to pressagainst the corresponding first electrical contacts 103 to createelectrical connection between the control structure 100 and the infusionstructure 110. The mutual pressing between these two correspondingelectrical contacts disposed on different structures can improve thereliability of the electrical connection. Similar to first electricalcontacts 103, the type of one of the second electrical contact 113 alsoincludes a rigid metal pin and an elastic conductive member. Preferably,in the embodiment of the present invention, the second electricalcontact 113 is a conductive spring. Similarly, the conductive spring canimprove the electrical connection performance. A groove is also arrangedaround the area where the second electrical contact 113 is disposed, anda sealing member 115 is arranged in the groove. Similarly, theelasticity of the conductive spring can further improve the electricalconnection performance.

Preferably, in the embodiment of the present invention, the two ends ofthe conductive spring have different diameters. And the diameter of theend exposed to the outside of the infusion structure 110 is shorter thanthat of the end inside the infusion structure 110. In this way, theconductive spring can be held in the case because of the longerdiameter, thus, when the control structure 100 is not installed on theinfusion structure 110, the longer diameter of the inner end can preventthe conductive spring from detaching from the infusion structure 110.

The embodiment of the present invention does not limit the positionwhere second electrical contacts 113 are arranged, as long as it can beelectrically connected to the corresponding first electrical contacts103. Preferably, in the embodiment of the present invention, the uppercase 111 a of the infusion structure 110 includes a convex portion 114where the second electrical contacts 113 are disposed, as shown in FIG.2 a . The shape of the convex portion 114 corresponds to that of theconcave 104 disposed on the control structure 100, allowing the twoportions to tightly fit each other and press the first electricalcontacts 103 and the corresponding second electrical contacts 113against each other to realize electrical connection.

In other embodiments of the present invention, the convex portion 114may be provided on the lower case 111 b, or when the infusion structure110 includes a integral case, the convex portion 114 is a part of theintegral case, which is not specifically limited herein.

The method of assembling the control structure 100 and the infusionstructure 110 to each other includes pressing the control structure 100on the infusion structure 110 along with the thickness direction of theinfusion structure 110, thereby fastening the first fastening portion102 and the second fastening portion 112. Or pressing the controlstructure 100 on the infusion structure 110 along with the lengthdirection of the infusion structure 110. Or alternatively, the controlstructure 100 can be pressed along with any angle between the thicknessdirection and the length direction of the infusion structure 110, makingthe first fastening portion 102 and the second fastening portion 112fastened with each other. Preferably, in the implementation of thepresent invention, the method of which the control structure 100 and theinfusion structure 110 are assembled with each other is to press thecontrol structure 100 on the infusion structure 110 along with thethickness direction of the infusion structure 110, making the firstfastening portion 102 and the second fastening portion 112 fastened witheach other, as shown the installation direction in FIG. 2 b.

In the embodiment of the present invention, the lower case 111 b of theinfusion structure 110 further includes an outward extending portion116, and a block 117 is provided on the outside of the outward extendingportion 116, as shown in FIG. 2 a . As mentioned above, the controlstructure 100 is pressed to the fastening position along the thicknessdirection of the infusion structure 110, thus the block 117 can preventthe control structure 100 from detaching along the length direction ofthe infusion structure 110, ensuring the normal operation of theinfusion device. Obviously, in another embodiment of the presentinvention, if the control structure 100 is pressed to the fasteningposition along with other directions, the control structure 100 can alsobe prevented from detaching from the infusion structure 110 by adjustingthe position of the block 117.

It should be noted here that “outward” and “outside” are relative to themain body of the infusion structure 110, and belong to a concept ofrelative position, whose position relationship is shown in FIG. 2 a orFIG. 2 b . The “outside” below has the same meaning as here.

In the embodiment of the present invention, the outer end of the outwardextending portion 116 is also provided with a pressing portion 118 forreleasing the blocking effect of the block 117. While the user isreplacing the infusion structure 110, a finger presses the pressingportion 118, releasing the control structure 100 from the block 117.Then, the user can remove the control structure 100 from the infusionstructure 110 with another two fingers.

Another embodiment of the present invention can also be provided with anunlocking hole 119 disposed in the inner side of the block 117. Whilethe pressing portion 118 is being pressed, a finger can enter theunlocking hole 119, thereby pushing the control structure 100 out toseparate the control structure 100 from the infusion structure 110. Inthe embodiment of the present invention, the unlocking hole 119 issquare. The square unlocking hole 119 can facilitate smooth entry offingers. In other embodiments of the present invention, the unlockinghole 119 may also have other shapes, which is not specifically limitedhere.

The lower case 111 b of the infusion structure 110 is also provided withone or more crease grooves 140. Two crease grooves 140 are provided onboth sides of the unlocking hole 119, as shown in FIG. 2 c and FIG. 2 d. After the crease groove 140 is provided, the thickness or width of thelower case 111 b at the position of the crease groove 140 (as shown bythe arrows in FIG. 2 c and FIG. 2 d ) is reduced. When the user pressesthe pressing portion 118, the lower case 111 b is easy to be broken atthe position of the crease groove 140, and the blocking of the controlstructure 100 by the block 117 is more smoothly released.

Preferably, in the embodiment of the present invention, two creasegrooves 140 are provided at the two ends of the block 117 respectively,as shown in FIG. 2 c . In another embodiment of the present invention,the crease groove 140 is provided on two corresponding lateral sides ofthe unlocking hole 119, as shown in FIG. 2 d.

The infusion structure 110 of the embodiment of the present invention isfurther provided with an infusion needle unit 121 for infusing the drugunder the skin.

A medical tape 120 is also provided on the bottom of the lower case 111b for attaching the infusion device on the surface of the user's skin.

FIG. 3 a and FIG. 3 b are respectively two schematic views of theinternal structure 130 of the infusion structure 110 of the embodimentof the present invention from two perspectives.

In the embodiment of the present invention, the internal structure 130includes mechanical units and electronic control units, used to realizethe infusion function, such as a drug reservoir 131, a drug outlet 132,a power supply 133, a driving wheel 134, a screw 135, a circuit board(not shown), a driving unit (not shown), etc. The movement of thedriving unit drives the driving wheel 134 to rotate, thus making thescrew 135 push the piston (not shown) in the drug reservoir 131 toforward, realizing the drug infusion.

In the embodiment of the present invention, the power supply 133 is aconventional button battery. In other embodiments of the presentinvention, the power supply 133 may also be other types of batteries, aslong as it can meet the requirements for supplying power to the infusiondevice. Preferably, in the embodiment of this present invention, thetype of the power supply 133 is double-row battery pack, that is, tworows of button batteries are respectively arranged on both sides of thedriving wheel 134, as shown in FIG. 3 b . Conventionally, the dischargecapacity of button batteries is low. The double-row button battery packcan reduce the discharge level of each battery, thereby extending theservice life of the battery. Furthermore, the double-row design of thepower supply 133 can make full use of the internal space and improve theintegration of the internal structure in the infusion device.

The infusion structure 110 in the embodiment of the present invention isalso provided with a circuit board or multiple three-dimensionalcircuits coated on the surface of a part of the structure for supplyingpower to specific structural units. The circuit board is a hard/rigidcircuit board or a flexible circuit board. Preferably, in the embodimentof the present invention, the circuit board is a flexible circuit board.The shape of the flexible circuit board is plastic, allowing it to beflexibly designed according to the internal space of the infusionstructure 110. At the same time, multiple connection ends can beprovided on the flexible circuit board to be electrically connected tosecond electrical contacts 113, thereby connecting the circuits of thecontrol structure 100 and the infusion structure 110, letting theinfusion device to perform drug infusion function.

An elastic conductor 136 is also provided inside the infusion structure130, as shown in FIG. 3 a . The elastic conductor 136 is electricallyconnected to the power supply 133 and the specific connection end on thecircuit board (or three-dimensional circuit), thereby supplying power tospecific structural units.

Similar to the elastic conductive member above mentioned, the type ofthe elastic conductor 136 includes a conductive spring, a conductiveleaf spring, a conductive rubber, a conductive silica gel, etc., whichare not specifically limited herein, as long as they can meet therequirements for electrically connecting the power supply 133 tospecific connection ends on the circuit board (or three-dimensionalcircuit). Preferably, in the embodiment of the present invention, theelastic conductor 136 is the conductive leaf spring. Obviously, sincethe infusion structure 110 has a double-row battery pack, the multipleconductive leaf springs are also designed as a double-row pack, as shownin FIG. 3 a.

The elastic conductor 136 can realize direct electrical connectionbetween the power supply 133 and the specific structural units, whichhelps to optimize the internal circuit design and reduce the complexityof the internal structure.

In summary, the present invention discloses a patch-type drug infusiondevice, in which a block, used for blocking the control structure, isprovided on the outside of the outward extending portion. The block canprevent the control structure from detaching from the infusionstructure, ensuring the normal operation of the infusion device.

While the invention has been described in detail with reference to thespecific embodiments of the present invention, it should be understoodthat it will be appreciated by those skilled in the art that the aboveembodiments may be modified without departing from the scope and spiritof the invention. The scope of the invention is defined by the appendedclaims.

1. A patch-type drug infusion device, comprising: a control structureprovided with multiple first fastening portions and first electricalcontacts exposed on a surface of the control structure; and an infusionstructure, including a case, provided with multiple second electricalcontacts exposed on a surface of the case and second fastening portionsthat cooperate with the first fastening portions, an outward extendingportion provided on the case, and a block, used for blocking the controlstructure, wherein the block is provided on an outside of the outwardextending portion, the first fastening portions and the second fasteningportions are fastened, making the control structure and the infusionstructure assembled together, the first electrical contacts connect withthe corresponding second electrical contacts.
 2. A patch-type druginfusion device of claim 1, wherein the first fastening portions and thesecond fastening portions include hooks, blocks, holes, or slots thatcooperate with each other.
 3. A patch-type drug infusion device of claim1, wherein an outer end of the outward extending portion is providedwith a pressing portion.
 4. A patch-type drug infusion device of claim1, wherein the case includes an upper case and a lower case.
 5. Apatch-type drug infusion device of claim 4, wherein the outwardextending portion is disposed on the lower case.
 6. A patch-type druginfusion device of claim 4, further comprising an unlocking holedisposed on the lower case and set in an inner side of the block.
 7. Apatch-type drug infusion device of claim 6, wherein the infusionstructure is further provided with at least one crease groove which isdisposed on a side of the unlocking hole.
 8. A patch-type drug infusiondevice of claim 7, wherein the at least one crease groove comprises twocrease grooves, the two crease grooves are provided at two ends of theblock, respectively.
 9. A patch-type drug infusion device of claim 1,wherein one of the first electrical contacts or one of the secondelectrical contacts is a rigid metal pin or an elastic conductivemember.
 10. A patch-type drug infusion device of claim 9, wherein theelastic conductive member includes a conductive spring, a conductiveleaf spring, a conductive rubber, or a conductive silica gel.
 11. Apatch-type drug infusion device of claim 1, wherein one of the firstelectrical contacts is a rigid metal pin while one of the secondelectrical contacts is a conductive spring, a groove, within which asealing element is provided, is disposed around an area where the secondelectrical contacts are disposed.